[receiver/sqlserver] Emit another metric for direct connection #39940
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Description
Before this PR the
sqlserver.page.life_expectancy
metric was only available when running on Windows as it was scraped from perf counters directly. This change enables the metric to be emitted also from directly connecting to SQL Server instances.Testing
Updated existing testing. #39930 adds this metric in the
configureAllScraperMetrics
, otherwise it would have needed to be added here.Documentation
Removed documentation note that this metric was only available on Windows.